As a web based platform, Market Center performance can be directly impacted by your local browser. We suggest you run Market Center on Google’s Chrome for optimal performance, click here for free access:

Some browsers work better than others which can also be regional or machine specific – your Market Center should navigate fluidly and without delay so make sure that you are operating on a browser that delivers the best performance.

Another solution to try is to close your browser window and reopen the application.